Enteric Coated Oral Delivery of Hydroxyapatite Nanoparticle for Modified Release Vitamin D₃ Formulation

Figure 3

(a) FTIR spectrum of (A) HA, (B) VD, and (C) HA-VD. (b) FTIR spectrum of (A) pure HP-55 and (B) HP-55 coated HA-NP. (c) TGA of (A) HA, (B) HA-VD, and (C) VD.

(a)

(b)

(c)